Regarding your map Moria, you have to set the condition for Objects in Area to military. This way the effect will be fired off only when your units enter the area. Alternatively, creating several Bring Object to Area conditions to encompass the whole of the Fellowship will have just as much use here, meaning the player will have to bring all of the Fellowship to the gate to win the game. As it is, without the condition set to military (or something else more definable) the effect fires off detecting any player 1 object, being the gate under it and so you get an immediate victory declaration.
With the map to Lothlorien, Trigger 1 needs to have "effect 0 - declare victory - gaia" set to "player 1". Trigger 2 should have "Condition 0 - Objects in Area - Player 1" set to have quantity of 1. This way the effect for victory will only fire when at least one unit of player one's reaches the area.
For more information on trigger tricks and the like, visit the link below: